Malicious PDF — malware analysis report

Static analysis result for SHA-256 111ebb877af4304f…

MALICIOUS

PDF

90.2 KB Created: 2021-07-25 05:35:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e7869b5faef7e7984da0b2e7cfc99b6e SHA-1: c63a4ec1af99aaf3a8ed96753c98e2e930229636 SHA-256: 111ebb877af4304f2037a4b951340e8583f7b25b8727aec9fe6f910286336330
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a tactic to host malicious files or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://luvnchrlysenglishtoys.com/clients/861429/File/kodalam.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160ce698404de5---bufixipaka.pdf
    • http://www.ciesol.com/ckfinder/userfiles/files/faxujineka.pdf
    • https://plasy.com/uploads/file/filijiwizuvabasata.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/6f72c973ca6da11c6ed3e592b0be3a55/zifadudiwokorir.pdf
    • http://aarogyamedico.com/userfiles/file/42705286355.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a65f1534a7a---84370110875.pdf
    • http://market-oborudovanie.ru/upload/file/46436893725.pdf
    • http://thepnguyentran.com/media/ftp/file/bupimijit.pdf
    • https://jf-orvalho.pt/userfiles/file/mimolajeginezexudoxajikoj.pdf
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/r9odounf3l9s7dg8jitftc3t23/pokosomuzexafajinududof.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/8bvu4ujrjoqtdjk667uq7ljj12/dunugabezumijalonopapefit.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/c31vgqcorq6ej18bccj0vj2lfv/zexilavumarabaj.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/pdtcheq2m19u3tqjn5h3ht5tlq/bufuvunosesili.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/3831382401e7824e6bb36adcfb8f29a5/45434435948.pdf
    • https://sjamsul-hidajat.id/ck_uploads/uploads/files/85979778965.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbba72396bc---vumebutilarinomuxijur.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/da0fdd14eeb396a25791827717e078bb/41832044028.pdf
    • http://bagiez.com/userfiles/file/tewuzumewegut.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/28159371259906c038331d6be18f5739/21368367172.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/es1kk1chis5n9tkgvttbpvmdr1/sopubetolilevomiwijigome.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8a4d4f317---37461270213.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160987f07861ae---5035310596.pdf
    • http://dieukhactransam.com/uploads/files/xavasovozitedaximeduwifu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=principles+of+accounting+final+exam+quizlet
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa00.bin
e4e87148950d64c347b0a66c4fff5a98fde4b1e5fb699303591842ba502119b4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA00 11232 bytes
font_01_sfnt_off00011411.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11411 16792 bytes
font_02_sfnt_off00012c23.bin
b1729c0ca9eeec36ec7a6a4c8836d9b6af68484d1f2905cb38282119901b865f
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C23 17344 bytes